Raina wakes up one night with a terrible upset stomach. Her mom has one, too, so it's probably just a bug. Raina eventually returns to school, where she's dealing with the usual highs and lows: friends, not-friends, and classmates who think the school year is just one long gross-out session. It soon becomes clear that Raina's tummy trouble isn't going away... and it coincides with her worries about food, school, and changing friendships. What's going...

Tackling the serious topic of stress in his famously entertaining manner, Professor Sapolsky sets the stage on a Kenyan savannah, with a hungry lion in hot pursuit of a terrified zebra. As he explains, the zebra's fight-or-flight response channels essential energy to its survival effort by shutting down and even damaging nonessential biological functions- in a temporary, short-term response. Unfortunately, humans can generate the same response simply...

The body is a fortress under constant assault. It faces threats from infectious diseases, parasites, allergens, environmental toxins, physical trauma, and natural disasters from without, to overzealous allergic, immune, and inflammatory responses, and cellular mutations from within. This course is an introduction to the field of pathophysiology--the study of the disruptions in a normal body's functions caused by disease or injury. Beginning with an...

Why is crunchy food so appealing? Why is it so hard to find words for flavors and smells? Why doesn't the stomach digest itself? How much can you eat before your stomach bursts? Can constipation kill you? Did it kill Elvis? In Gulp we meet scientists who tackle the questions no one else thinks of; or has the courage to ask.

A guide for girls explaining both the physical and psychological aspects of puberty.

The course concludes with an exploration of other potentially addictive behaviors. Professor Polk argues that some artificial stimuli - junk food, pornography, and video games to name three - are "supernormal," meaning that they actually activate the brain's reward circuit more strongly than natural stimuli do, leading to some of the same neurological effects as drug use.

"In Eve, Cat Bohannon answers questions scientists should have been addressing for decades. With boundless curiosity and sharp wit, Bohannon covers the past 200 million years to explain the specific science behind the development of the female sex. Eve is not just a sweeping revision of human history, it's an urgent and necessary corrective for a world that has focused primarily on the male body for far too long. Bohannon's findings, including everything...